6-31936002-A-G

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBS1_SupportingBS2

The NM_000063.6(C2):c.929A>G(p.Asn310Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000467 in 1,613,058 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. N310N) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00033 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00048 ( 3 hom. )

Consequence

C2
NM_000063.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 0.348

Publications

6 publications found

Variant links:

Genes affected

C2 (HGNC:1248): (complement C2) Component C2 is a serum glycoprotein that functions as part of the classical pathway of the complement system. Activated C1 cleaves C2 into C2a and C2b. The serine proteinase C2a then combines with complement factor 4b to create the C3 or C5 convertase. Deficiency of C2 has been reported to associated with certain autoimmune diseases and SNPs in this gene have been associated with altered susceptibility to age-related macular degeneration. This gene localizes within the class III region of the MHC on the short arm of chromosome 6. Alternative splicing results in multiple transcript variants encoding distinct isoforms. Additional transcript variants have been described in publications but their full-length sequence has not been determined.[provided by RefSeq, Mar 2009]

C2 links:

ENSG00000244255 (HGNC:):

ENSG00000244255 links:

C2-AS1 (HGNC:49464): (C2 antisense RNA 1)

C2-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.027373105).

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000335 (51/152296) while in subpopulation NFE AF = 0.000544 (37/68016). AF 95% confidence interval is 0.000405. There are 0 homozygotes in GnomAd4. There are 28 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000063.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
C2	NM_000063.6	MANE Select	c.929A>G	p.Asn310Ser	missense	Exon 7 of 18	NP_000054.2
C2	NM_001282458.2		c.842A>G	p.Asn281Ser	missense	Exon 7 of 18	NP_001269387.1	A0A0G2JL69
C2	NM_001145903.3		c.533A>G	p.Asn178Ser	missense	Exon 5 of 16	NP_001139375.1	P06681-3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
C2	ENST00000299367.10	TSL:1 MANE Select	c.929A>G	p.Asn310Ser	missense	Exon 7 of 18	ENSP00000299367.5	P06681-1
ENSG00000244255	ENST00000456570.5	TSL:2	c.530-1317A>G		intron	N/A	ENSP00000410815.1	B4E1Z4
C2	ENST00000447952.7	TSL:3	c.743A>G	p.Asn248Ser	missense	Exon 6 of 17	ENSP00000391354.3	F2Z3N2

Frequencies

GnomAD3 genomes

AF:

0.000335

AC:

AN:

152178

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000458

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000282

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000544

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000564

AC:

139

AN:

246664

AF XY:

0.000550

show subpopulations

Gnomad AFR exome

AF:

0.000199

Gnomad AMR exome

AF:

0.00110

Gnomad ASJ exome

AF:

0.000401

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000786

Gnomad OTH exome

AF:

0.000987

GnomAD4 exome

AF:

0.000481

AC:

703

AN:

1460762

Hom.:

Cov.:

AF XY:

0.000479

AC XY:

348

AN XY:

726700

show subpopulations

African (AFR)

AF:

0.000119

AC:

AN:

33480

American (AMR)

AF:

0.00101

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.000191

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.000134

AC:

AN:

52314

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000554

AC:

616

AN:

1111996

Other (OTH)

AF:

0.000431

AC:

AN:

60386

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.471

Heterozygous variant carriers

116

155

194

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

110

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000335

AC:

AN:

152296

Hom.:

Cov.:

AF XY:

0.000376

AC XY:

AN XY:

74476

show subpopulations

African (AFR)

AF:

0.0000722

AC:

AN:

41552

American (AMR)

AF:

0.000457

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.000288

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.000282

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000544

AC:

AN:

68016

Other (OTH)

AF:

0.00

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000551

Hom.:

Bravo

AF:

0.000374

TwinsUK

AF:

0.000809

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000331

AC:

ESP6500EA

AF:

0.000738

AC:

ExAC

AF:

0.000598

AC:

EpiCase

AF:

0.000436

EpiControl

AF:

0.000771

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Age related macular degeneration 14 (1)

Complement component 2 deficiency (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.067

BayesDel_addAF

Benign

-0.53

BayesDel_noAF

Benign

-0.58

CADD

Benign

0.41

(source)

DANN

Benign

0.53

DEOGEN2

Benign

0.068

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.073

LIST_S2

Benign

0.65

M_CAP

Benign

0.016

MetaRNN

Benign

0.027

MetaSVM

Benign

-1.1

MutationAssessor

Benign

-0.070

PhyloP100

0.35

PROVEAN

Benign

-0.72

REVEL

Benign

0.15

Sift

Benign

0.29

Sift4G

Benign

0.35

Polyphen

0.0

Vest4

0.016

MVP

0.57

MPC

0.24

ClinPred

0.0040

GERP RS

-1.5

Varity_R

0.12

gMVP

0.14

Mutation Taster

=96/4

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over